Proceedings ArticleDOI
1.5-V Linear CMOS OTA with -60dB IM3 for High Frequency Applications
Tien-Yu Lo,Chung-Chih Hung +1 more
- pp 167-170
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TLDR
In this paper, a linearized Operational Transconductance Amplifier (OTA) for low-voltage and high frequency applications is proposed by using double differential pairs and the source degeneration structure under nano-scale CMOS technology, the nonlinearity caused by short channel effect from small feature size can be minimized.Abstract:
A novel configuration of linearized Operational Transconductance Amplifier (OTA) for low-voltage and high frequency applications is proposed. By using double differential pairs and the source degeneration structure under nano-scale CMOS technology, the nonlinearity caused by short channel effect from small feature size can be minimized. A robust common-mode control system is designed for input and output common-mode stability, and thus reduces distortion caused by common-mode voltage variation. Tuning ability can be achieved by using MOS transistors in the linear region. The linearity of the OTA is about -60dB third-order inter- modulation (IM3) distortion for up to 0.9 VPP at 40 MHz. Ths OTA was fabricated by the TSMC 180-nm Deep N-WELL CMOS process. It occupies a small area of 15.1 x 10-3 mm2 and the power consumption is 9.5 mW under a 1.5-V supply voltage.read more
Citations
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Journal ArticleDOI
Modeling and Detection of Hotspot in Shaded Photovoltaic Cells
TL;DR: A hotspot detection scheme is proposed, enabling to identify the PV module that is under hotspot condition, and can be used to avoid the permanent damage of the cells under hotspots, thus their drawback on the power efficiency of the entire PV system.
Proceedings ArticleDOI
A wide tuning range G m -C filter for multi-mode direct-conversion wireless receivers
TL;DR: A third-order channel selection filter for multi-mode direct-conversion receiver is presented and can operate with the cutoff frequency of 500 kHz to 20 MHz, and thus meet the requirement of different wireless applications.
Proceedings ArticleDOI
A 1 GHz OTA-based low-pass filter with a high-speed automatic tuning scheme
Tien-Yu Lo,Chung-Chih Hung +1 more
TL;DR: In this paper, a continuous-time 4th-order equiripple linear phase G m -C filter with an automatic tuning circuit is presented, where a high speed OTA based on the inverter structure is realized.
Proceedings ArticleDOI
Low-Voltage Multi-Mode G m -C Channel Selection Filter for Mobile Applications
Tien-Yu Lo,Chung-Chih Hung +1 more
TL;DR: A third-order Butterworth low-pass filter implemented with the transconductors was designed by TSMC 0.18-mum CMOS process and the measurement results show that the filter can operate with the cutoff frequency of 135 kHz to 2.2 MHz.
Proceedings ArticleDOI
Design of a digitally tunable 5 th order GM-C filter using linearized OTA in 90nm CMOS technology
TL;DR: In this article, an analog 5th-order GM-S low-pass filter structure using ten identical operational transconductance amplifiers (OTA) for high speed wireless systems was designed, which can be tuned by a single bias current, which is provided by a 5-bit current DAC.
References
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Journal ArticleDOI
A fully balanced pseudo-differential OTA with common-mode feedforward and inherent common-mode feedback detector
TL;DR: In this article, a pseudo-differential fully balanced fully symmetric CMOS operational transconductance amplifier (OTA) architecture with inherent common-mode detection is proposed, which achieves a third harmonic distortion of -43 dB for 900 mV/sub pp/ at 30 MHz.
Journal ArticleDOI
A sixth-order continuous-time bandpass sigma-delta modulator for digital radio IF
TL;DR: In this paper, the authors present a 6-order continuous-time bandpass sigma-delta modulator (SDM) for analog-to-digital conversion of intermediate-frequency signals.
Journal ArticleDOI
OTA linearity enhancement technique for high frequency applications with IM3 below -65 dB
A. Lewinski,Jose Silva-Martinez +1 more
TL;DR: A technique to enhance the linearity of continuous-time operational transconductance amplifiers (OTA)-C filters working at high frequencies is proposed, fabricated in a standard CMOS 0.35-/spl mu/m technology.
Journal ArticleDOI
A low-voltage, low-power CMOS fifth-order elliptic GM-C filter for baseband mobile, wireless communication
TL;DR: The design and performance of a rail-to-rail low-voltage CMOS fifth-order elliptic low-pass GM-C filter for baseband mobile communication and the operational transconductance amplifier used in this filter are presented.
Journal ArticleDOI
A 2-V/sub pp/ 80-200-MHz fourth-order continuous-time linear phase filter with automatic frequency tuning
TL;DR: In this paper, a CMOS 80-200MHz fourth-order continuous-time 0.05/spl deg/equiripple linear phase filter with an automatic frequency tuning system is presented.